"If you're asking me do I want to compete again, the answer is hell yes. I'm a competitor," Armstrong said during the second part of a two-part interview, which aired Friday on Winfrey's OWN channel and online.

"I can't lie to you. I'd love the opportunity to be able to compete, but that isn't the reason that I'm doing this. Frankly, this may not be the most popular answer, but I think I deserve it," he said.

In part one of the interview, which aired Thursday, Armstrong admitted, unequivocally and for the first time, that he used performance-enhancing drugs on the way to seven Tour de France wins.

When asked whether he felt disgraced, Armstrong said that he did.

Photos: Lance Armstrong's rise and fall 28 photos

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After denying the allegations for years, cyclist Lance Armstrong admitted to using performance-enhancing drugs. As a result, he was stripped of his seven Tour de France titles and an Olympic bronze medal. Click through the gallery for a look at his life and career.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong, 17, competes in the Jeep Triathlon Grand Prix in 1988. He became a professional triathlete at age 16 and joined the U.S. National Cycling Team two years later.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong wins the 18th stage of the Tour de France in 1995. He finished the race for the first time that year, ending in 36th place.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong rides at the Ikon Ride for the Roses to benefit the Lance Armstrong Foundation in May 1998. He established the foundation to benefit cancer research after he was diagnosed with testicular cancer in 1996. After treatment, he was declared cancer-free in February 1997.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong leads his teammates during the final stage of the 1999 Tour de France.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong takes his honor lap on the Champs-Élysées in Paris after winning the Tour de France for the first time in 1999.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After winning the 2000 Tour de France, Armstrong holds his son Luke on his shoulders.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong rides during the 18th stage of the 2001 Tour de France. He won the tour that year for the third consecutive time.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong celebrates winning the 10th stage of the Tour de France in 2001.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After winning the 2001 Tour de France, Armstrong presents President George W. Bush with a U.S. Postal Service yellow jersey and a replica of the bike he used to win the race.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong celebrates on the podium after winning the Tour de France by 61 seconds in 2003.

Lance Armstrong's rise and fall – After his sixth consecutive Tour de France win, Armstrong attends a celebration in his honor in front of the Texas State Capitol in Austin.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong arrives at the 2005 American Music Awards in Los Angeles with then-fiancee Sheryl Crow. The couple never made it down the aisle, splitting up the following year.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong holds up a paper displaying the number seven at the start of the Tour de France in 2005. He went on to win his seventh consecutive Tour de France.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong testifies during a Senate hearing in 2008 on Capitol Hill. The hearing focused on finding a cure for cancer in the 21st century.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In 2009, Armstrong suffered a broken collarbone after falling during a race in Spain.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Young Armstrong fans write messages on the ground ahead of the 2009 Tour de France. He came in third place that year.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong launches the three-day Livestrong Global Cancer Summit in 2009 in Dublin, Ireland. The event was organized by his foundation.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In May 2010, Armstrong crashes during the Amgen Tour of California. That same day, he denied allegations of doping made by former teammate Floyd Landis.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong looks back as he rides during the 2010 Tour de France.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong's son Luke; his twin daughters, Isabelle and Grace; and his 1-year-old son, Max, stand outside the Radio Shack team bus on a rest day during the 2010 Tour de France.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong finished 23rd in the 2010 Tour de France. He announced his retirement from the world of professional cycling in February 2011. He said he wanted to devote more time to his family and the fight against cancer.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – The frame of Armstrong's bike is engraved with the names of his four children at the time and the Spanish word for five, "cinco." His fifth child, Olivia, was born in October 2010.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong competes in the 70.3 Ironman Triathlon in Panama City, Florida, in February 2012. He went on to claim two Half Ironman triathlon titles by June of that year.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong addresses participants at the Livestrong Challenge Ride on October 21, 2012, days after he stepped down as chairman of his Livestrong cancer charity.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – International Cycling Union President Pat McQuaid announces the decision to strip Armstrong of his seven Tour de France wins and ban him from the tournament for life on October 22, 2012. "Lance Armstrong has no place in cycling," he said.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In January 2013, Armstrong speaks with Oprah Winfrey about the controversy surrounding his cycling career. He admitted, unequivocally and for the first time, that he used performance-enhancing drugs while competing.

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EXPAND GALLERY

Photos: Lance Armstrong's rise and fall 28 photos

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After denying the allegations for years, cyclist Lance Armstrong admitted to using performance-enhancing drugs. As a result, he was stripped of his seven Tour de France titles and an Olympic bronze medal. Click through the gallery for a look at his life and career.

Hide Caption

1 of 28

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong, 17, competes in the Jeep Triathlon Grand Prix in 1988. He became a professional triathlete at age 16 and joined the U.S. National Cycling Team two years later.

Hide Caption

2 of 28

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong wins the 18th stage of the Tour de France in 1995. He finished the race for the first time that year, ending in 36th place.

Hide Caption

3 of 28

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong rides at the Ikon Ride for the Roses to benefit the Lance Armstrong Foundation in May 1998. He established the foundation to benefit cancer research after he was diagnosed with testicular cancer in 1996. After treatment, he was declared cancer-free in February 1997.

Hide Caption

4 of 28

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong leads his teammates during the final stage of the 1999 Tour de France.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong takes his honor lap on the Champs-Élysées in Paris after winning the Tour de France for the first time in 1999.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After winning the 2000 Tour de France, Armstrong holds his son Luke on his shoulders.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong rides during the 18th stage of the 2001 Tour de France. He won the tour that year for the third consecutive time.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong celebrates winning the 10th stage of the Tour de France in 2001.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – After winning the 2001 Tour de France, Armstrong presents President George W. Bush with a U.S. Postal Service yellow jersey and a replica of the bike he used to win the race.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong celebrates on the podium after winning the Tour de France by 61 seconds in 2003.

Lance Armstrong's rise and fall – After his sixth consecutive Tour de France win, Armstrong attends a celebration in his honor in front of the Texas State Capitol in Austin.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong arrives at the 2005 American Music Awards in Los Angeles with then-fiancee Sheryl Crow. The couple never made it down the aisle, splitting up the following year.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong holds up a paper displaying the number seven at the start of the Tour de France in 2005. He went on to win his seventh consecutive Tour de France.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong testifies during a Senate hearing in 2008 on Capitol Hill. The hearing focused on finding a cure for cancer in the 21st century.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In 2009, Armstrong suffered a broken collarbone after falling during a race in Spain.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Young Armstrong fans write messages on the ground ahead of the 2009 Tour de France. He came in third place that year.

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong launches the three-day Livestrong Global Cancer Summit in 2009 in Dublin, Ireland. The event was organized by his foundation.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In May 2010, Armstrong crashes during the Amgen Tour of California. That same day, he denied allegations of doping made by former teammate Floyd Landis.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong looks back as he rides during the 2010 Tour de France.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong's son Luke; his twin daughters, Isabelle and Grace; and his 1-year-old son, Max, stand outside the Radio Shack team bus on a rest day during the 2010 Tour de France.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong finished 23rd in the 2010 Tour de France. He announced his retirement from the world of professional cycling in February 2011. He said he wanted to devote more time to his family and the fight against cancer.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – The frame of Armstrong's bike is engraved with the names of his four children at the time and the Spanish word for five, "cinco." His fifth child, Olivia, was born in October 2010.

Hide Caption

24 of 28

Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong competes in the 70.3 Ironman Triathlon in Panama City, Florida, in February 2012. He went on to claim two Half Ironman triathlon titles by June of that year.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – Armstrong addresses participants at the Livestrong Challenge Ride on October 21, 2012, days after he stepped down as chairman of his Livestrong cancer charity.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – International Cycling Union President Pat McQuaid announces the decision to strip Armstrong of his seven Tour de France wins and ban him from the tournament for life on October 22, 2012. "Lance Armstrong has no place in cycling," he said.

Hide Caption

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Photos: Lance Armstrong's rise and fall28 photos

Lance Armstrong's rise and fall – In January 2013, Armstrong speaks with Oprah Winfrey about the controversy surrounding his cycling career. He admitted, unequivocally and for the first time, that he used performance-enhancing drugs while competing.

The U.S. Anti-Doping Agency hit Armstrong with a lifetime ban after the agency issued a 202-page report in October that said there was overwhelming evidence he was directly involved in a sophisticated doping program.

Armstrong, in the first part of the interview, talked about the culture of cycling at the time he competed, telling Winfrey that doping was widespread then and just as much "part of the job" as water bottles and tire pumps. The former cyclist said he didn't view using banned drugs then as cheating. "I viewed it as a level playing field."

The scandal has tarred the Livestrong cancer charity that Armstrong founded and brought an end to his endorsement deals.

He described to Winfrey stepping down from that charity, which he characterized as his "sixth child." That moment, he said, was his most humbling.

"To make that decision and to step aside was -- that was big," he said in Friday's broadcast. "It was the best thing for the organization, but it hurt like hell."

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Throughout both parts of the interview with Winfrey, Armstrong spoke steadily and showed little emotion.

That changed when Armstrong spoke about his family, and especially his kids.

Appearing to hold back tears, Armstrong said he confessed to the three oldest children over the recent holiday break. "The older kids need to not be living with this issue in their lives," the athlete said. "It isn't fair."

Speaking specifically about his 13-year-old son, who he had heard defending him, Armstrong said he told the youth: "Don't defend me anymore."

During the first part of the interview, Armstrong described himself as "deeply flawed" and "arrogant," and spoke often of how so much was his "fault."

"Tyler Hamilton gets a phone call: Be on a plane tomorrow. We're flying to Valencia to do a blood transfusion. That's what happens," Coyle said.

Armstrong described his years of denial as "one big lie that I repeated a lot of times." He had races to win and a fairy tale image to keep up.

He reminisced on his storied past of being a hero who overcame cancer, winning the Tour repeatedly, having a happy marriage, children. "It's just this mythic, perfect story, and it isn't true," he said.

"If he is sincere in his desire to correct his past mistakes, he will testify under oath about the full extent of his doping activities," USADA CEO Travis Tygart said.

The International Cycling Union called it "disturbing" to see Armstrong's confessions, but it said the sport is much different today than it was 10 years ago.

"Lance Armstrong's decision finally to confront his past is an important step forward on the long road to repairing the damage that has been caused to cycling and to restoring confidence in the sport," union president Pat McQuaid said.

He told Winfrey that he then developed a "ruthless and relentless" attitude that helped him survive. But he carried it with him into his sports career, "and that's bad," he said.

He returned to the cycling world, however. His breakthrough came in 1999, and he didn't stop as he reeled off seven straight wins in his sport's most prestigious race. Allegations of doping began during this time, as did Armstrong's vehement defiance.

He left the sport after his last win, in 2005, only to return to the tour in 2009.

Armstrong still insists he was clean when he finished third that year, but that comeback led to his downfall.

"We wouldn't be sitting here if I didn't come back," he told Winfrey.

In 2011, Armstrong retired once more from cycling. But his fight to maintain his clean reputation continued. Federal prosecutors launched a criminal investigation, but it was dropped in February.

In April, the USADA notified Armstrong of an investigation into new doping charges. In response, the cyclist accused the organization of trying to "dredge up discredited" allegations and filed a lawsuit in federal court trying to halt the case.

Those who suffered for speaking out now feel vindicated.

They include Betsy Andreu, wife of fellow cyclist Frankie Andreu, who said she overheard Armstrong acknowledge to a doctor treating him for cancer in 1996 that he had used performance-enhancing drugs.

"This was a guy who used to be my friend, who decimated me," Andreu told CNN's Anderson Cooper on Thursday night. "He could have come clean. He owed it to me. He owes it to the sport that he destroyed."

The former athletic icon conceded he'd let down many fans "who believed in me and supported me."

"I will spend the rest of my life ... trying to earn back trust and apologize to people."